Transducing system having damping means for constant speed control

Claim 1

IN A TAPE-TRANSPORT MECHANISM WHEREIN A DRIVE CAPSTAN DRIVEN BY A CONSTANT SPEED MOTOR COOPERATES WITH AN IDLER ROLLER ON AN IDLER ROLLER SHAFT TO FORM A LOOP OF TRAVELING TAPE HAVING AN INGOING RUN FROM THE CAPSTAN TO THE IDLER ROLLER AND ON OUTGOING RUN FROM THE IDLER ROLLER TO THE CAPSTAN, WITH NIP ROLLERS COOPERATING WITH THE CAPSTAN TO PLACE THE LOOP UNDER TENSION AND WITH A TRANSDUCER STATION ALONG ONE OF SAID TWO RUNS OF THE TAPE MEANS TO STABLIZE SAID ONE RUN OF THE TWO RUNS OF THE TAPE, SAID STABLIZING MEANS INCLUDING: A CONCENTRIC ANNULAR CHAMBER INSIDE THE IDLER ROLLER SURROUNDING SAID SHACT; A CONCENTRIC ANNULAR WEIGHT LOOSELY CONFINED IN SAID CHAMBER; AND A BODY OF LIQUID IN SAID CHAMBER SERVING AS SOLE MEANS FOR SPACING THE WEIGHT FROM ALL OF THE INNER SURFACES OF THE CHAMBER, SAID LIQUID ACTING IN SHEAR TO RETARD ACCELERATION OF THE IDLER ROLLER RELATIVE TO THE WEIGHT AND TO TRANSMIT DRIVING FORCE FROM THE WEIGHT TO THE IDLER ROLLER WHEN THE IDLER ROLLER LAGS RELATIVE TO ROTATION OF THE WEIGHT.